#app {
	width: 100%;
	height: 100%;
}

#tiao {
	height: 20px;
	background-color: lightgray;
}

#xieyi {
	font-size: 16px;
	color: red;
}

#tongyi {
	text-align: center;
	font-size: 16px;
}

.anniu {
	width: 70%;
	margin-left: 15%;
}